Oil-filter.



PATENTED JAN. 1, 1907.

T. T.- SAWDON.

OIL FILTER. APPLICATION FILED JUNE 7. 190a.

. channeled baffle-plates.

THOMAS T. SAWDON, OF SAN FRANCISCO, CALIFORNIA.

OIL-FILTER.

Specification of Letters Patent.

Patented Jan. 1, 1907.-

Application filed June 7,1906. Serial No. 320,631.

To all whom it may concern:

Be it known that I, TH'oMAs T. SAW'DON, a citizen of the United States,residing in the city and county of San Francisco and State ofCalifornia, have invented new and useful Improvements in Oil-Filters, ofwhich the following is a specification.

My invention relates to oil-filtering apparatus.

Its object is to provide a simple, practical, and efficient filter foruse particularly on shipboard, where prevailing conditions due to thepitching of the vessel render most filters useless.

The invention .comprehends, essentially, the liberation of the oil dropby drop at the bottom of a tank filled with water or other suitablecleansing liquid and the rolling of these drops over and over along asuitable inclined surface or surfaces and within suitableguiding-channels in the effort of the oil to reach the top, this rollingaction of the oil serving to work out foreign matters and to leave theoil finally collected at the top after passing through suitablefiltering media clean and ready for reuse.

Having reference to the accompanying drawings, Figure 1 is a sectionalview of a preferred form of my apparatus. Fig. 2 shows a modification ofthe same. Fig. 3 represents various forms of corrugated or A representsa tank of any suitable size, shape, and material. This tank has a ta'pered bottom with a sludge-cock 2 for drainage purposes. Within thetankv fits a removable frame 3, carrying a series of staggeredalternately arranged and inclined bafiles 4. These bafiles arepreferably corrugated longitudinally to provide one or more underneathchannels along which drops of oil are adapted to travel within definedlimits in the effort of the oil to'pass up through the water which iscontained in the tank. These corrugations or channels may assume avariety of forms, as shown in Fig. 3.

5 is a filter-box removably fitting inside the tank above the baffles,and 6 is a reservoir-space for the clarified oil which has passedthrough the. water in the tank and through the filter-box. There may beany desired number of filter-boxes, and they may be of any suitableconstruction and contain any desired or approved filtering medium. Thereservoir 6 has a suitable draw-ofi cock 7.

8 is a closed-bottom pan fitting into the top of the tank and coweringthe same and adapted to receive the oil which is to be filtered.

9 is a strainer in the top of pan 8 to catch the solid foreign mattersin the oil, and so prevent clogging of the passages in the apparatus.

The pan 8 has a valved draw-off pipe 10 at the bottom for the water andan oil-outlet pipe 11 near the top for the oil. From pan 8 the settledand strained oil passes through pipe 11 downward beneath the apparatusand then upward drop by drop through a sight-feed device 12 ofwell-known construction into the body of water contained in tank A. Eachdrop as it is liberated seeks an upward passa e through the Water; butbefore reaching t is made to roll over and over along the under side ofthe successive baffles.

There is a separate oil-inlet 13 with its individual sight-feed device12 for each corrugation in a plate. Thus if the plates are provided withsix underneath longitudinal channels there will be a separate oil-feedfor each channel, and the dro s of oil liberated by the severaloil-feeding evices will travel throughout their course along the variousbaflies in separate channels. From this it will be seen that no matterhow much the apparatus may be shaken by the tossing of t e vessel thismotion will have noeifect on the movement of the oil through the waterin tank A. Furthermore, by providing the channeled baffles I canincrease the size and the consequent capacity of my'device to any extentwithin practical limits. The length of time to which the oil issubjected to this rolling and scrubbing action depends on the len th ofthe tank and the number of the bafl ies. In Fig. 2 I have shown the sameprinciple of a multiple sight-feed applied to a cylindrical filter inwhich a longitudinally-corrugated helical baffle takes the place ofaplurality of alternately-inclined straight baffles.

In both of the tanks-A and A of the respective figures it is designed toheat the water and the oil undergoing filtration by suitable means, asthe steam-coils 14.

It is possible that various modifications in my invention may be madewithout departing from the principle thereof, and I do not wish to beunderstood necessarily as limiting myself to my specific construction.

e submerged filter-box it Having thus described my invention, what Iclaim, and desire to secure by Letters Patent, is

1. A filter comprising a tank to contain water, an inclined bafilesubmer ed in the tank, said bafile having its under ace corrugated toform 'a plurality of independent channels along which globules of oilW11] roll in their ascent through the water, and separate feeding meansfor the independent channels.

2. A filter com rising a tank to contain water, an inclined tank,'saidbaflle having a plurality of independent non-communicating channels intowhich oil-globules are delivered and allowed to roll therealong, and afeeding device positioned relative to each channel.

3. A filte r comprising a tank to contain witr, a series of stag ered,alternately arran ed and inclined ba es submerged in the tank, each ofsaid baflles having a plurality of channels, and means to admit oil droby drop into the res ective channels of the lbwerm'ostbafile, w erebythe oil so admitted travels the length of the lowermost baflle andfollows a defined path upward'along the successive bafiles.

4. A filter comprising a tank to contain battle submerged in the inalternately-inclined, superposed position, a submerged filter-box abovethe baffles, a collection-reservoir for the filtered oil, a reservoirabove the filter-box for the oil to be filtered, an oil-feed connection.between said reservoir for the unfiltered oil and the bottom ofthe tankand beneath the baffles, and means for regulating the admission of oildrop by drop into the tank.

In testimony whereof I have hereunto set I nesses.

THOMAS T. SAWDON.

water, a series of removable baflles arranged my hand in presence of twosubscribing wit-

